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## Homework Statement

A 100m long ramp is constructed perpendicular to a river’s edge with the

highest point 20 m directly above the edge of the bank

motorcycle stunt rider uses the ramp in an attempt to leap across a 30m wide

river. The motorcycle accelerates from rest at the bottom of the ramp and takes

off with a speed of 20 ms−1 moving parallel to the face of the ramp and

perpendicular to the river bank.

(a) What is the maximum height above the river banks reached by the

motorcycle?

(b) How long after take-off does the motorcycle land on the opposite bank?

(c) Calculate how far from the river the motorcycle lands.

(d) Calculate the velocity of the motorcycle at the moment of landing. Give your

answer both as the magnitude and direction of the velocity vector and in

component form.

## Homework Equations

s= ut+1/2 at^2

v2= u2 + 2as

v= u+at

## The Attempt at a Solution

(a)

(a)

arcsin0.2= 11.5369 degrees

u= 20 sin 11.5369....= 3.9458...

components in y diection-

s=?

v=0

u=3.9458...

a= -10

v2= u2+2as

o=15.569 + 2(-10) s

20s= 15.569

s= 0.77849 meteres.....which doesnt seem correct.....?

can anyone do this ??

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